mcpbeat

Mockdevice Testing

facebook/meta-wearables-dat-android-mockdevice-testing

MockDeviceKit for testing without physical glasses hardware

1k tokens
context cost
the whole folder, loaded on every use
1
files
instructions only
0
copies elsewhere
how many repositories repackaged it
339
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository 
npx skills add https://github.com/facebook/meta-wearables-dat-android --skill mockdevice-testing

The instruction itself

12 sections, as written by the author

MockDevice Testing (Android)

Use MockDeviceKit to test DAT SDK integrations without physical Meta glasses.

MockDeviceKit simulates Meta glasses behavior for development and testing. It provides:

  • MockDeviceKit — Entry point for creating simulated devices
  • MockGlasses — Simulated Ray-Ban Meta glasses
  • MockCameraKit — Simulated camera with configurable video feed and photo capture

Setup

Add mwdat-mockdevice to your Gradle dependencies:

dependencies {
    implementation(libs.mwdat.mockdevice)
}

Creating a mock device

import com.meta.wearable.dat.mockdevice.MockDeviceKit
import com.meta.wearable.dat.mockdevice.api.MockDeviceKitConfig

val mockDeviceKit = MockDeviceKit.getInstance(context)

// Attach fake registration and connectivity (auto-initializes Wearables if needed).
// By default, Wearables.registrationState transitions to Registered.
mockDeviceKit.enable()

// Or start in unregistered state to test registration flows:
// mockDeviceKit.enable(MockDeviceKitConfig(initiallyRegistered = false))

val device = mockDeviceKit.pairGlasses(GlassesModel.RAYBAN_META).getOrThrow()

You can check mockDeviceKit.isEnabled to query whether the mock environment is active.

Simulating device states

// Simulate glasses lifecycle
device.powerOn()
device.unfold()
device.don()    // Simulate wearing the glasses

// Later...
device.doff()   // Simulate removing
device.fold()
device.powerOff()

Configuring permissions

MockDeviceKit provides permissions to control permission behavior without the Meta AI app.

By default, RequestPermissionContract returns Granted. Use set() to control checkPermissionStatus() and setRequestResult() to control request outcomes.

val mockDeviceKit = MockDeviceKit.getInstance(context)

// Simulate denied camera permission status
mockDeviceKit.permissions.set(Permission.CAMERA, PermissionStatus.Denied)

// Simulate denied request result (user tapping "deny")
mockDeviceKit.permissions.setRequestResult(Permission.CAMERA, PermissionStatus.Denied)

Setting up mock camera feeds

Video streaming

val camera = device.services.camera
camera.setCameraFeed(videoUri)

Photo capture

val camera = device.services.camera
camera.setCapturedImage(imageUri)

Note: Android doesn't transcode video automatically. Mock video files must be in h.265 format. Use FFmpeg to convert:

ffmpeg -hwaccel videotoolbox -i input.mp4 -c:v hevc_videotoolbox -c:a aac_at -tag:v hvc1 -vf "scale=540:960" output.mov

Writing instrumentation tests

Create a reusable test base class:

import android.content.Context
import androidx.test.ext.junit.rules.ActivityScenarioRule
import androidx.test.platform.app.InstrumentationRegistry
import com.meta.wearable.dat.mockdevice.MockDeviceKit
import com.meta.wearable.dat.mockdevice.api.MockDeviceKitInterface
import org.junit.After
import org.junit.Before
import org.junit.Rule

open class MockDeviceKitTestCase<T : Any>(
    private val activityClass: Class<T>
) {
    @get:Rule
    val scenarioRule = ActivityScenarioRule(activityClass)

    protected lateinit var mockDeviceKit: MockDeviceKitInterface
    protected lateinit var targetContext: Context

    @Before
    open fun setUp() {
        val instrumentation = InstrumentationRegistry.getInstrumentation()
        targetContext = instrumentation.targetContext
        mockDeviceKit = MockDeviceKit.getInstance(targetContext)
        grantRuntimePermissions()
    }

    @After
    open fun tearDown() {
        mockDeviceKit.disable()
    }

    private fun grantRuntimePermissions() {
        val packageName = targetContext.packageName
        val shell = InstrumentationRegistry.getInstrumentation().uiAutomation
        shell.executeShellCommand("pm grant $packageName android.permission.BLUETOOTH_CONNECT")
        shell.executeShellCommand("pm grant $packageName android.permission.CAMERA")
    }
}

Using MockDeviceKit in the CameraAccess sample

The CameraAccess sample app includes a Debug menu for MockDeviceKit:

  • Tap the Debug icon to open the MockDeviceKit menu
  • Tap Pair RayBan Meta to create a simulated device
  • Use PowerOn, Unfold, Don to simulate glasses states
  • Select video/image files for mock camera feeds
  • Start streaming to see simulated frames

Supported media formats

| Type | Formats |

|------|---------|

| Video | h.264 (AVC), h.265 (HEVC) |

| Image | JPEG, PNG |

Links

How to use it

Copy the folder

Take facebook/meta-wearables-dat-android-mockdevice-testing from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.